<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width: 200px;
            height: 200px;
            background-color: red;
            margin: 20px;
        }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
<script>

    // document.write("hello");
    // document.write("<div class='box'>123123</div>");

    // document.write("****************<br>");
    // document.write("****************")
    // document.write("<br>");
    // document.write("****************")
    // document.write("****************")

</script>
</html>